Finding the Fourth Proportional to 78,456.96, 118,112.31 and 71,481.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.96 : 118,112.31 = 71,481.78 : x
2. Step 2: Convert to fraction form
   78,456.96/118,112.31 = 71,481.78/x
3. Step 3: Cross multiply
   78,456.96x = 118,112.31 × 71,481.78
4. Step 4: Simplify right side
   78,456.96x = 8,442,878,158.71
5. Step 5: Solve for x
   x = 8,442,878,158.71/78,456.96
6. Step 6: Final answer
   x = 107,611.59